Springer ,
Majalah, Jurnal, Buletin
Maurice King, Peter Bewes, James Cairns, Jim Thornton, editor
Oxford University Press, 1990
Buku Referensi
Androsov, P.
Foreign Language, [date of publication not identified]
Buku Teks
Bhat M., Sriram, author
Jaypee Brothers Medical Publishers, 2013
Buku Teks
edited by G.R. McLatchie and D.J. Leaper
Oxford University Press, 1996
Buku Referensi